<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!--准备好一个“容器”-->
<div id="test"></div>

<!--引入react核心库-->
<script type="text/javascript" src="../js/react.development.js"></script>
<!--引入react-dom，用于支持react操作DOM -->
<script type="text/javascript" src="../js/react-dom.development.js"></script>
<!--引入babel，用于将jsx转为js -->
<script type="text/javascript" src="../js/babel.min.js"></script>

<script type="text/javascript" src="../js/prop-types.js"></script>

<script type="text/babel">
    //创建组件
    class Login extends React.Component {
        state = {
            username: '',
            password: ''
        }

        saveFormData = (dateType, event) => {
            this.setState({[dateType]: event.target.value})
        }

        handleSubmit = (event) => {
            event.preventDefault()
            const {username, password} = this.state
            alert(`你输入的用户名是：${username},你输入的密码是：${password}`)
        }

        render() {
            return (
                <form onSubmit={this.handleSubmit}>
                    用户名：<input onChange={(event) => {
                    this.saveFormData('username', event)
                }} type="text" name="username"></input>

                    密码：<input onChange={(event) => {
                    this.saveFormData('password', event)
                }} type="password" name="password"></input>

                    <button>登录</button>
                </form>
            )
        }
    }

    //2.渲染组件到页面
    ReactDOM.render(<Login></Login>, document.getElementById('test'))
</script>
</body>
</html>

